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Junpin said diode
2018-12-21 17:30:53
Diode, a device with two electrodes in electronic components, allows current to flow only in a single direction, and many uses use its rectifier function. Varicap Diode is used as an electronic adjustable capacitor.
Most diodes have current directionality which we usually call "Rectifying" function. The most common function of a diode is to allow only current to pass in a single direction (called forward bias) and to block in reverse (called reverse bias). Therefore, the diode can be thought of as an electronic version of the check valve.
Early vacuum electronic diode; it was an electronic device capable of conducting unidirectional currents. There is a PN junction and two lead terminals inside the semiconductor diode. The electronic device has unidirectional current conductivity in accordance with the direction of applied voltage. Generally speaking, crystal diode is a p-n junction interface formed by sintering of p-type semiconductor and n-type semiconductor.
A space charge layer is formed on both sides of the interface to form a self-built electric field. When the applied voltage equals zero, the diffusion current caused by the carrier concentration difference between the two sides of the p-n junction is equal to the drift current caused by the self-built electric field, which is also the characteristic of the diode under normal conditions.
Early diodes included "Cat's Whisker Crystals" and vacuum tubes (known as "Thermionic Valves" in Britain). Most of today's most common diodes use semiconductor materials such as silicon or germanium.
Most diodes have current directionality which we usually call "Rectifying" function. The most common function of a diode is to allow only current to pass in a single direction (called forward bias) and to block in reverse (called reverse bias). Therefore, the diode can be thought of as an electronic version of the check valve.
Early vacuum electronic diode; it was an electronic device capable of conducting unidirectional currents. There is a PN junction and two lead terminals inside the semiconductor diode. The electronic device has unidirectional current conductivity in accordance with the direction of applied voltage. Generally speaking, crystal diode is a p-n junction interface formed by sintering of p-type semiconductor and n-type semiconductor.
A space charge layer is formed on both sides of the interface to form a self-built electric field. When the applied voltage equals zero, the diffusion current caused by the carrier concentration difference between the two sides of the p-n junction is equal to the drift current caused by the self-built electric field, which is also the characteristic of the diode under normal conditions.
Early diodes included "Cat's Whisker Crystals" and vacuum tubes (known as "Thermionic Valves" in Britain). Most of today's most common diodes use semiconductor materials such as silicon or germanium.